Nice looking camper.
Is that top flat where it meats up with the front angled piece, or do you have some trim up there that might stop water? On thing you don't need is water collecting on a flat roof. Water can collect on the top of that bottom trim around the camper as well. I good bead of sealant, a slightly beloved top surface or a long piece of triangle stock glued in there might help hold off water collection.
Let us know how the first trip goes
